NTP sources at EPs?

["R.P. Aditya" <aditya () dnai com>]

Do any Exchange Points operate NTP Stratum 1 or 2 clocks for participants to
sync off of? If not, it might be a good service to provide at an IX. There is
a good list of GPS based NTP servers at:

  http://www.eecis.udel.edu/~ntp/hardware.html

Thanks,
Adi